An issue was discovered in Servisnet Tessa 0.0.2. Authorization data is available via an unauthenticated /data-service/users/ request.
https://www.pentest.com.tr/exploits/Servisnet-Tessa-Privilege-Escalation.html
https://www.exploit-db.com/exploits/50712
http://www.servisnet.com.tr/en/page/products
http://packetstormsecurity.com/files/165873/Servisnet-Tessa-Privilege-Escalation.html